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[1]刘永,潘宇翔,张志军,等.含水率和干密度对某铀尾砂基质吸力的影响研究[J].中国安全生产科学技术,2018,14(11):45-51.[doi:10.11731/j.issn.1673-193x.2018.11.007]
 LIU Yong,PAN Yuxiang,ZHANG Zhijun,et al.Research on influence of water content and dry density on matric suction of uranium tailings[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(11):45-51.[doi:10.11731/j.issn.1673-193x.2018.11.007]
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含水率和干密度对某铀尾砂基质吸力的影响研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年11期
页码:
45-51
栏目:
学术论著
出版日期:
2018-11-30

文章信息/Info

Title:
Research on influence of water content and dry density on matric suction of uranium tailings
文章编号:
1673-193X(2018)-11-0045-07
作者:
刘永123潘宇翔123张志军123桂荣123戴兵1章求才123伍玲玲1
(1.南华大学 资源环境与安全工程学院,湖南 衡阳 421001;2. 湖南省铀尾矿库退役治理工程技术研究中心,湖南 衡阳 421001;3. 铀矿冶放射性控制技术湖南省工程研究中心,湖南 衡阳 421001)
Author(s):
LIU Yong123 PAN Yuxiang123 ZHANG Zhijun123 GUI Rong123 DAI Bing1 ZHANG Qiucai123 WU Lingling1
(1. College of Resource Environment and Safety Engineering, University of South China, Hengyang Hunan 421001, China;2. Hunan Province Engineering Technology Research Center of Uranium Tailings Treatment Technology, University of South China, Hengyang Hunan 421001, China;3. Hunan Province Engineering Research Center of Radioactive Control Technology in Uranium Mining and Metallurgy, University of South China, Hengyang Hunan 421001, China)
关键词:
铀尾矿砂水-土特征曲线吸力应力特性曲线含水率干密度
Keywords:
uranium tailings soilwater characteristic curve (SWCC) suctionstress characteristic curve (SSCC) water content dry density
分类号:
X936;TD 77
DOI:
10.11731/j.issn.1673-193x.2018.11.007
文献标志码:
A
摘要:
为探究不同水土特性状态下铀尾砂基质吸力变化规律及特性,采用滤纸法在不同含水率和干密度条件下测定了3种铀尾砂的基质吸力,利用Van Genuchten (VG)模型对其水土特性曲线(SWCC)进行拟合,并构建了吸力应力特性曲线(SSCC)。研究结果表明:在高含水量阶段铀尾砂基质吸力随含水率减小而缓慢增加,当含水量小于临界值时基质吸力急剧增大。尾砂颗粒越均匀,孔隙体积越大,其残余含水率越低;在同等含水率下,随着干密度的增大,铀尾砂基质吸力有所提高,但吸力增量会因含水率增加而逐渐减小。1#和2#尾砂吸力应力随有效饱和度增长呈现出先减小后增大的规律,3#尾砂则呈现出先迅速降低后增大且增幅不断变缓的趋势,表明当1#和2#尾砂作为主要筑坝材料时,基质吸力对铀尾矿坝抗剪强度及安全性系数的影响十分有限。
Abstract:
In order to explore the change laws and characteristics of matric suction for the uranium tailings under different water and soil characteristic status, the matric suction of three types of uranium tailings were measure under different water contents and dry densities by using the method of filter paper. The soilwater characteristic curve (SWCC) was fitted by using the Van Genuchten (VG) model, and the suctionstress characteristic curve (SSCC) was established. The results showed that in the stage of high water content, the matric suction of uranium tailings increased slowly with the decrease of water content, and it increased sharply when the water content was less than the critical value. The more uniform the tailings particles and the larger the pore volume, the lower the residual water content. Under the same water content, the matric suction of uranium tailings increased with the increase of dry density, but the increment of suction would decrease gradually with the increase of water content. The suction stress of 1# and 2# tailings decreased first and then increased with the increase of effective saturation, while that of 3# tailings rapidly decreased first and then increased, with a continuously slowing amplification. It showed that when taking 1# and 2# tailings as the main materials of dam construction, the influence of matric suction on the shear strength and safety coefficient of uranium tailings dam was extremely limited.

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备注/Memo

备注/Memo:
收稿日期: 2018-08-07;数字出版日期:2018-11-20
基金项目: 国家自然科学基金项目(51774187, 51804164;51804163 );湖南省科技厅中央引导地方科技发展专项资金项目(2017CT5006);湖南省重点研发计划课题(2017SK2280);湖南省自然科学基金项目(2018JJ3448);湖南省教育厅重点科研基金项目(17A184);2018年湖南省研究生科研创新项目
作者简介: 刘永,博士,教授,主要研究方向为铀尾矿库退役治理技术。
通信作者: 张志军,博士,教授,主要研究方向为岩土工程灾害预测与控制。
更新日期/Last Update: 2018-12-03